//状态栏高度
const SYSTEM_INFO=uni.getSystemInfoSync()
export const getStatusBarHeight=()=>SYSTEM_INFO.statusBarHeight||15
//标题栏高度
export const getTitleBarHeight=()=>{
	if(uni.getMenuButtonBoundingClientRect){
		let {top,height}=uni.getMenuButtonBoundingClientRect()
		return height+(top-getStatusBarHeight())*2
	}else{
		return 40
	}
}
//导航栏高度
export const getNavBarHeight=()=>getStatusBarHeight()+getTitleBarHeight()